如何在 Espresso 测试中调用自定义视图的方法？

Question

我有一个自定义视图，我需要在该视图上调用特定方法来打开 activity。在 Espresso 测试中执行此操作的正确方法是什么？我只需要扩充此视图还是需要编写自定义 ViewAction?

Answer 1

您可以像这样创建自定义 ViewAction

public class MyCustomViewAction implements ViewAction{

    @Override
    public Matcher<View> getConstraints(){
        return isAssignableFrom(YourCustomView.class);
    }


    @Override
    public String getDescription(){
        return "whatever";
    }

    @Override
    public void perform(UiController uiController, View view){
        YourCustomView yourCustomView = (YourCustomView) view;
        yourCustomView.yourCustomMethod();
        // tadaaa
    }

}

并像往常一样使用它，比如

onView(withId(whatever)).perform(new MyCustomViewAction());

Answer 2

为了在断言中使用自定义方法的结果，我对 lellomans answer 进行了以下修改：

public class MyCustomViewAction implements ViewAction{
    MyReturnObject returnValue = null;

    @Override
    public Matcher<View> getConstraints(){
        return isAssignableFrom(YourCustomView.class);
    }


    @Override
    public String getDescription(){
        return "whatever";
    }

    @Override
    public void perform(UiController uiController, View view){
        YourCustomView yourCustomView = (YourCustomView) view;
        // store the returnValue   
        returnValue = yourCustomView.yourCustomMethod();
    }   
}

我没有创建新的 MyCustomViewAction()，而是创建了一个 myAction 对象供以后重用。

MyCustomViewAction myAction = new MyCustomViewAction();
onView(withId(whatever)).perform(myAction);
MyReturnObject returnValueForSpecialAssertions = myAction.returnValue;
// assert something with returnValueForSpecialAssertions

如何在 Espresso 测试中调用自定义视图的方法？

How to call a method on a custom view in an Espresso test?

android

android-layout

android-testing

android-espresso